Waste cathode carbon may not be familiar to most people, but its harm should not be underestimated.
From June, 2065438 to June, 2006, electrolytic aluminum waste residue was listed in the National List of Hazardous Wastes by the Ministry of Environmental Protection, and its hazard characteristic was "T" (toxicity). Waste cathode carbon was an important part of electrolytic aluminum waste residue.
From the chemical composition, its toxicity mainly comes from its high content of fluoride and cyanide. After a long period of wind and rain, these toxic substances will be transferred and volatilized into the atmosphere, or mixed into rivers, and seeped into the ground with the rain, polluting the soil and groundwater. For human body, excessive fluoride has obvious carcinogenic effect, and for skin and respiratory mucosa, fluoride also has strong irritation and corrosiveness. As for cyanide, it is a famous deadly poison.
According to the Law on the Prevention and Control of Environmental Pollution by Solid Waste, it should be handed over to qualified units for special disposal. According to the published figures, aluminum blue produces about 3000 tons of electrolytic cell solid waste including cathode carbon every year. But how to deal with this 3000-ton electrolytic cell solid waste? There are still questions from all walks of life.
Chinalco responded by saying that Lanzhou Aluminum entrusted a qualified third-party enterprise to dispose of the waste cathode carbon before 20 15, and all of them were stored in the special warehouse of the factory after 20 15. After being reported last time, Lanlv has cleaned up the surrounding places of third-party enterprises according to the requirements of Gansu Provincial Environmental Protection Department. The contents of this media report are all scenes in the last disposal process.
However, whether the contents reported by the media are new discoveries or "old news" as Chinalco responded, whether the first responsible person is Blue Aluminum or the so-called third party, it is a clear fact that the waste cathode carbon is simply buried in the barren hills and ditches in the upper reaches of the Yellow River.